Cinnamon
A variant of Quaker parrot (monk parakeet) (Myiopsitta monachus)

Representative Quaker parrot (monk parakeet)photo — a dedicated image of this exact morph isn't available yet.
A sex-linked mutation that lightens melanin, giving warm olive/lime plumage with horn-colored rather than dark markings. Often combined with blue for pastel birds.
Keeper tips for this variant
Cinnamon is sex-linked, so a cinnamon father guarantees cinnamon (or carrier) daughters — useful for visual sexing in a breeding setup.